Abrasive paper and cloth.



ma. II/IAIILEY.

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Patented Nov. 23, 1915.

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VANIA.

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Assiettes To n cnnnonun. a CORPORATION Or enfans ABRASIVE PAPER CLOTH.

Specification of Letters Patent.

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Original application iiled April 22, 1913. Serial No. 762,827. Divided and this application led March 31,

1915. Serial No. 18,822. l

To a?? lcfzom 1'1 may concern.:

Be it known that I. RALPH B. MANLEY, a y

citizen of the United States. residing at Niagara Falls. in the'county of Xiagara and State of New York. have invented a new and useful Improvement in Abrasive Paper and Cloth. of which the following isa full. clear. and exact description. reference being had to the accompanying drawings.l forming part. of this specification. in which the iigure is a side elevation. partly diagrammatic.y of one forni of apparatus which may be employed in the manufacture of the paper and cloth.

My invention relates to abrasive papel' and cloth and provides anarticle of this character having a greater degree'of flexibility imparted thereto than has heretofore been possible.

Abrasive paper and cloth of the character to which my invention relates. consists of grains of abrasive material. such as carborundum; aloxite. Hint. garnet. emery and other similar materials, which are fastened to a backing of paper or cloth by means of glue or other adhesive-. This material is widely used in the grinding and polishing of metal. leather. wood and a variety of other substances. `When abrasive paper or cloth of this character is made up with sutiicient glue to properly hold the abrasive grains, and is properly dried, it can be flexed or bent to a certain extent. depending lupon the amount and character of the glue and of the abrasive grains and other conditions, but it cannot be bent at very short angles on account of the stiffness of the glue. Tf this is attempted. itresults in the glue and adhesive grains peelingoii in large flakes. For many purposes. it is highly desirable that this paper shall possess a very considerable degree of fiexiblity. For instance, emery cloth is often used by machinists in various classes of hand work where it is necessaryr to reach curved and irregular surfaces of small section. In the wood-working industry, garnet paper is placed around the drums of sanding machines. and if the paper is stid and lacks flexibility. it will not lie close to the surface of the drum. This frequently results in an irregular cylindrical abrasive surface. and if the paper is forced into contact with the drum its structure is injured so that it begins to peel od quickly when as to present subjected'to use. The finishing paper used by cabinet makers when ,smoothing wood should also possess a high egree of ilexibility. It has been attempted to obtain Athis degree of flexibility in various ways. as by the use of various grades of glue and the addition of different substances to the glue. N one of these. methods have, however, been entirely successful. For instance. the addition of such substances to the glue prevents it from properly drying or remaining perfectly dry and also results in the loss of ad- My' invention overcomes -these ditiiculties and produces an. abrasive paper or cloth which is capable of being bent or flexed to a large degree without injury thereto. l[

.heslve power.

produce this result by; mechanical treatment of the paper or cloth 1n such a manner that the adhesive bond is broken at substantially regular intervals along the surface of the backing in a direction normal to the backing and in a manner to impart this Hexibility.

While my improved method may be carried out in various apparatus of various kinds, T have in the accompanying drawings illustrated one form of apparatus which I have found to be highly satisfactory and which will now be described.

In this drawing. Q designates thev frame of the machine, which carries two endless belts 3 and at, both of which are shown as driven b v the respective drive belts 5 and '6` from any suitable source of power. These belts 3 and t are disposed in the following manner. The belt l is carried over the driven pulley T. member 8. This fexing member may be a metal bar of rectangular or other section so a suitable sharp corner over which the backing of the abrasive cloth or paper can be drawn and bent to the 11equired degree. llt may also consist of a round bar or roll of relatively small diameter. The belt 3 runs over the driving pulley and the idler wheel 9. thence over the Herring member 8 on top of the belt i and` thence over the idler 10 and back to the driving pulley 13. 11 designates the roll of paper or cloth to be treated. This is led with its @rain side up between `the belts 3 and -t an overthe Hexing member 8 to the rewinding` roll 12, which is also driven by and thence over therflexingl ways and by the use of suitable means, such as the belt 14. Means character) at substantially regular intervals,

along the surface of the backingin a direction normal to the backing and in such a manner that the flexibility increased. y

I have found from actual practice that when garnet paper, for instance, is treated in-this manner, it can be run on a drum sander from three to four times as long as ordinary paper Without peeling.

The degree of flexibility which is obtained is proportional to the frequency of thel breaks; that is, the more breaks per lineal inch, the greater is the flexibility. Care, however, should be taken that the breaks are not too close together, as this overcomes the adhesion ofthe grain and makes the cloth or paper useless for many purposes. The

number of breaks, per lineal inch, will varyl with cloth and paper of different grits, butI is very greatly have found that the breaks, in order to give proper flexibility, should in all cases be not less than five and not more than twenty per lineal inch.

My invention has also proved to be of great assistance in increasing the efficiency and prolonging the life of emery cloth and aloXite cloth,`which are used in certain operations of finishing machinery. It has also proved very useful/in treating garnet cloth to Ibe used for garnet belts in the finishing of molded surfaces. It prevents the peeling of paper for use in heel-scouring in the shoe industries. It has, of course, many other useful applications.

lThis application is a division of my copending application Serial No. 762,827, filed April 22, 1913.

I claim: l.

As a new article of manufacture, an abrasive-coated backing, in which the a'brasive bond of the coating material has `been mechanically broken or flexed so as to give not less than five nor more than twenty breaks per `lineal inch, substantially as described.

In testimony whereof, I have hereunto set my hand.

RALPH B. MANLEY.

Witnesses:

FRANK H. MANLEY, GEORGE N. ALLEN. 

